The software applications are those that control the essential functions. Software is intangible, meaning it "cannot be touched". The software is often referred to as the operating system. Thus, it means the applications and operating systems used with computers. This software application includes, word processing, that which helps you to write letters documents, and multimedia, which combines text, pictures, video, music and animation into one. Computer software, or just software, is which governs computing resources and provide convenience for users. The types of software include web pages developed in languages and frameworks like HTML, PHP, Perl, JSP, ASP.NET, XML, and desktop applications like Open Office, Microsoft Word developed in languages like C, C++, Java, C#, or Smalltalk. Computer systems divide software systems into three major classes like system software, programming software and application software.